As you can see in the video, it only takes a few seconds to get the phone unlocked with a printed photo. It also works with a black and white photo.

You can see video of Oneplus 6 face unlock fooled by a photo:

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Anyone who has been an Android user for long enough might remember when Google added face unlock in Android 4.0. It was a neat demo, but we all quickly realized that it was easy to defeat with a photo of the phone’s owner. Google added a “liveness test” later that required you to blink, but even that was simple enough to fool with a video or photo animated to “blink.” OnePlus doesn’t even implement the liveness test because that slows down unlocking.

The problem then (and to this day) is that a regular front-facing camera can’t differentiate between a flat surface and a real face. Apple got around this by using an IR dot projector to map faces in 3D. Meanwhile, Samsung’s face unlock works together with iris scanning. If the device is unlocked with your face only, you can’t access more secure apps and services like Samsung Pay until you verify with a secure method.

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